in fact, science changes. nothing is more worthless than a science textbook from the '50s. >> but what shouldn't change from the original constitution of america, surely. >> my faith isn't based on the constitution, it's based on -- >> i get that. but america in terms of its populism, it's about fairness and equality. i went to see "lincoln" the movie a few weeks ago. it was a riveting movie, daniel day lewis is brilliant as lincoln. but all about how he fought in his last few months as president to get slavery apolished. there were millions of americans who thought slavery was perfectly acceptable. who was outraged at what he was doing. he was not trying to make something popular at the moment. he knew instinctively it was just wrong, unfair, unequal. >> and why did he know that? because it's in the bible. >> right, but we had this discussion. >> it's in the bible. he was building it on biblical truth. the bible says every man should be free. >> but you don't believe every man should be free and equal? >> of